Signs a girl is interested or not?

[4x4_powerstroker]

There's a girl I met recently, we exchanged numbers/Facebook. 90% of the time she's the one to text me first, and if I ever happen to text her first she always responds within 5 minutes or less. We carry on conversation really well over text, and she always responds with long responses, and we joke back and forth all the time. In person, we also seem to get along really well, and just generally have a good time no matter what we're doing, she laughs and even the stupidest stuff I say and seems to have a good time as well. The first time we'd hung out she made a comment about 'next time you come and get me..." so I would think that is a good sign. It's just hard for me to tell if she is being friendly, or if there is something there. She's even gone so far as apologizing for not texting back if she was sleeping, or whatever, and things I've said she says 'yeah I think we are both the same on that.' We just seem to agree on a lot of stuff, and would like to know where to go from here.